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Butterfly is just above, If i unscrew more the plate will jam in to the throat.

I have removed the the idle switch and turned on the engine, then turned with a screw driver the switch. Idle pass from around 1200 to 2500 when I turn the switch so i consider the switch working and transfer properly the signal to the computer.

I will check later today if IAC is working well, how the engine should react when I disconect it ?

Throttle not closing- "Butterfly screw is just ABOVE the butterfly mechanical contact."